The capital costs of installing a sufficiently large solar system combined with having to live in a luxury coach using minimal assets strikes me as being akin to living in a metal tent, and getting a return on the investment in a decade or so.

If I had to balance living expenses in a luxury coach and campground, versus living in a primitive setting with no utilities, I would instead research a less expensive way to get campsites. That might mean finding cheap monthly rates, using cheap military facilities, or work camping like Dale and Paulette did.

Just the solar panel array to make a meaningful contribution to battery charging is going to be very expensive and I'll be damned if I want to sit in the dark just to save battery power til the sun comes up.